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Grade 6 · unit review

Review: Maps as Decision Models

Combine scale, coordinates, conditional time estimates, and explicit route criteria.

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Bring the unit skills together

Use these 4 new cases to check your reasoning. Choices are temporary and are not saved to an account, sent to staff or recorded as school grades. Download your current review choices before leaving or reloading.

Unit review questions
1. New fictional map scale: 1 cm=300 m. Two places are 5 cm apart in a straight line. What separation is represented?
2. New local coordinates: positive x east, positive y north, one block 80 m. P=(2,3), Q=(2,-2). What is their vertical separation?
3. A new fictional route is 900 m; model rate 45 m/min; supplied wait 4 min. What conditional total follows?
4. New paper routes: X 700 m with stairs; Y 950 m marked step-free; Z 850 m marked step-free. Require step-free, then shortest. Which qualifies and ranks first?

The download contains your current choices and any checked feedback. Keep the separate transfer-task work in your own document; downloading its instructions does not mark it complete.

Use the skills in a new task

Original fictional map: scale 1 cm=200 m. Library L=(0,0), hall H=(4,0) in a separate local block grid, one block=100 m. Straight-line L–H measures 2 cm. Route A is 500 m with stairs. Route B is 600 m marked step-free and has a 3-minute wait. Require a step-free route. Model moving rate is 50 m/min. Calculate separation using both representations, select a route, estimate its time, and state two limits.

Work on paper or in your own document. Explain the choices you made.

  • Calculate 400 m from the map scale and local coordinates.
  • Apply the step-free requirement before comparing length.
  • Give moving time plus waiting time.
  • Distinguish straight-line separation from route length.
  • Name missing current conditions and the constant-rate assumption.
Compare with a model response

Scale gives 2 × 200=400 m separation; coordinates give four blocks ×100=400 m. Route B meets the paper-map step-free requirement, while A does not. B’s moving time is 600 ÷50=12 minutes; adding the supplied three-minute wait gives 15 minutes. The 400 m separation is not the 600 m route. The result assumes a constant supplied rate; current closures and entrance details remain unknown.

A different response can also meet the criteria. Compare the evidence and reasoning, rather than copying the wording.